What if Canada's Income Tax Rate Was Zero?

It won't happening. And perhaps it shouldn't happen. But we can talk.

By reputation, income tax is an immutable fact of life. But perhaps we can push back against that popular assumption. Or, to put it a different way, thinking about how different things can be is actually loads of fun.

That’s not to suggest that accurately anticipating the full impact of blowing up central economic pillars is simple. But it’s worth a conversation.

First off, because they’ve been around so long, we can easily lose sight of the fact that income taxes cause real economic pain. The median Canadian household earns around $85,000 in a year. Of that, some 13 percent ($11,000) is lost to federal income tax. Provincial income tax and sales taxes, of course, drive that number a lot higher. If owning a house is out of reach for so many Canadians, that’s one of the biggest reasons why.

Having said that, the $200 billion or so in personal income taxes that Canada collects each year represents around 40 percent of federal spending. In fact, in the absence of other policy changes, eliminating federal personal income tax would probably lead to significant drops in business tax revenues too. (I could see many small businesses choosing to maximize employee salaries to reduce their corporate tax liability.)

So if we wanted to cut taxes without piling on even more debt, we’d need to replace that amount either by finding alternate revenue sources or by cutting spending. If you’ve been keeping up with The Audit, you’ve already seen where and how we might find some serious budget savings in previous posts.

But for fascinating reasons, some of that $200 billion (or, including corporate taxes, $300 billion) shortfall could be made up by wiping out income tax itself. How’s that?

For one thing, many government entitlements and payouts essentially exist to make up for income lost through taxes. For example, the federal government will spend around $26 billion on child tax credits (CCB) in 2025. Since those payments are indexed to income, eliminating federal income tax would, de facto, raise everyone’s income. That increase would drop CCB spending by as much as $15 billion. Naturally, we’d want to reset the program eligibility thresholds to ensure that low-income working families aren’t being hurt by the change, but the savings would still be significant.

There are more payment programs of that sort than you might imagine. Without income taxes to worry about:

• The $6.2 billion GST/HST credit would cost us around $3 billion less each year.

• The Canada Workers Benefit (CWB) could cost $1.5 billion dollars less.

• The Old Age Security (OAS) Clawback would likely generate an extra billion dollars each year in taxes.

• The Guaranteed Income Supplement for low-income OAS recipients could save $4 billion a year.

Even when factoring in for threshold recalculations to protect vulnerable families from unintended consequences, all those indirect consequences of a tax cut could easily add up to $20 billion in federal spending cuts. And don’t forget how the cost of administering and enforcing the income tax system would disappear. That’ll save us most of the $11 billion CRA costs us each year.